Tessa was recording observations of some items around her classroom. She recorded a physical description of each item, the volume, and its mass. Tessa has made a physical description of her pencil, and she has obtained the volume. What tool would Tessa use to measure the mass of her pencil? A) ruler B) beaker C) balance D) graduated cylinder

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".